From 10c65f97b424fcee439463f933140df2a0022f98 Mon Sep 17 00:00:00 2001
From: Jeff Johnson <quic_jjohnson@quicinc.com>
Date: Mon, 9 Oct 2023 09:39:42 -0700
Subject: [PATCH] wifi: ath11k: Introduce and use ath11k_sta_to_arsta()

Currently, the logic to return an ath11k_sta pointer, given a
ieee80211_sta pointer, uses typecasting throughout the driver. In
general, conversion functions are preferable to typecasting since
using a conversion function allows the compiler to validate the types
of both the input and output parameters.

ath11k already defines a conversion function ath11k_vif_to_arvif() for
a similar conversion. So introduce ath11k_sta_to_arsta() for this use
case, and convert all of the existing typecasting to use this
function.

No functional changes, compile tested only.

Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20231009-ath11k_sta_to_arsta-v1-1-1563e3a307e8@quicinc.com
---
 drivers/net/wireless/ath/ath11k/core.h        |  5 ++++
 drivers/net/wireless/ath/ath11k/debugfs.c     |  4 +--
 drivers/net/wireless/ath/ath11k/debugfs_sta.c | 30 +++++++++----------
 drivers/net/wireless/ath/ath11k/dp_rx.c       |  8 ++---
 drivers/net/wireless/ath/ath11k/dp_tx.c       |  4 +--
 drivers/net/wireless/ath/ath11k/mac.c         | 18 +++++------
 drivers/net/wireless/ath/ath11k/peer.c        |  2 +-
 drivers/net/wireless/ath/ath11k/wmi.c         |  6 ++--
 8 files changed, 41 insertions(+), 36 deletions(-)

--- a/drivers/net/wireless/ath/ath11k/core.h
+++ b/drivers/net/wireless/ath/ath11k/core.h
@@ -1223,6 +1223,11 @@ static inline struct ath11k_vif *ath11k_
 	return (struct ath11k_vif *)vif->drv_priv;
 }
 
+static inline struct ath11k_sta *ath11k_sta_to_arsta(struct ieee80211_sta *sta)
+{
+	return (struct ath11k_sta *)sta->drv_priv;
+}
+
 static inline struct ath11k *ath11k_ab_to_ar(struct ath11k_base *ab,
 					     int mac_id)
 {
--- a/drivers/net/wireless/ath/ath11k/debugfs.c
+++ b/drivers/net/wireless/ath/ath11k/debugfs.c
@@ -1459,7 +1459,7 @@ static void ath11k_reset_peer_ps_duratio
 					  struct ieee80211_sta *sta)
 {
 	struct ath11k *ar = data;
-	struct ath11k_sta *arsta = (struct ath11k_sta *)sta->drv_priv;
+	struct ath11k_sta *arsta = ath11k_sta_to_arsta(sta);
 
 	spin_lock_bh(&ar->data_lock);
 	arsta->ps_total_duration = 0;
@@ -1510,7 +1510,7 @@ static void ath11k_peer_ps_state_disable
 					 struct ieee80211_sta *sta)
 {
 	struct ath11k *ar = data;
-	struct ath11k_sta *arsta = (struct ath11k_sta *)sta->drv_priv;
+	struct ath11k_sta *arsta = ath11k_sta_to_arsta(sta);
 
 	spin_lock_bh(&ar->data_lock);
 	arsta->peer_ps_state = WMI_PEER_PS_STATE_DISABLED;
--- a/drivers/net/wireless/ath/ath11k/debugfs_sta.c
+++ b/drivers/net/wireless/ath/ath11k/debugfs_sta.c
@@ -136,7 +136,7 @@ static ssize_t ath11k_dbg_sta_dump_tx_st
 					    size_t count, loff_t *ppos)
 {
 	struct ieee80211_sta *sta = file->private_data;
-	struct ath11k_sta *arsta = (struct ath11k_sta *)sta->drv_priv;
+	struct ath11k_sta *arsta = ath11k_sta_to_arsta(sta);
 	struct ath11k *ar = arsta->arvif->ar;
 	struct ath11k_htt_data_stats *stats;
 	static const char *str_name[ATH11K_STATS_TYPE_MAX] = {"succ", "fail",
@@ -243,7 +243,7 @@ static ssize_t ath11k_dbg_sta_dump_rx_st
 					    size_t count, loff_t *ppos)
 {
 	struct ieee80211_sta *sta = file->private_data;
-	struct ath11k_sta *arsta = (struct ath11k_sta *)sta->drv_priv;
+	struct ath11k_sta *arsta = ath11k_sta_to_arsta(sta);
 	struct ath11k *ar = arsta->arvif->ar;
 	struct ath11k_rx_peer_stats *rx_stats = arsta->rx_stats;
 	int len = 0, i, retval = 0;
@@ -340,7 +340,7 @@ static int
 ath11k_dbg_sta_open_htt_peer_stats(struct inode *inode, struct file *file)
 {
 	struct ieee80211_sta *sta = inode->i_private;
-	struct ath11k_sta *arsta = (struct ath11k_sta *)sta->drv_priv;
+	struct ath11k_sta *arsta = ath11k_sta_to_arsta(sta);
 	struct ath11k *ar = arsta->arvif->ar;
 	struct debug_htt_stats_req *stats_req;
 	int type = ar->debug.htt_stats.type;
@@ -376,7 +376,7 @@ static int
 ath11k_dbg_sta_release_htt_peer_stats(struct inode *inode, struct file *file)
 {
 	struct ieee80211_sta *sta = inode->i_private;
-	struct ath11k_sta *arsta = (struct ath11k_sta *)sta->drv_priv;
+	struct ath11k_sta *arsta = ath11k_sta_to_arsta(sta);
 	struct ath11k *ar = arsta->arvif->ar;
 
 	mutex_lock(&ar->conf_mutex);
@@ -413,7 +413,7 @@ static ssize_t ath11k_dbg_sta_write_peer
 						size_t count, loff_t *ppos)
 {
 	struct ieee80211_sta *sta = file->private_data;
-	struct ath11k_sta *arsta = (struct ath11k_sta *)sta->drv_priv;
+	struct ath11k_sta *arsta = ath11k_sta_to_arsta(sta);
 	struct ath11k *ar = arsta->arvif->ar;
 	int ret, enable;
 
@@ -453,7 +453,7 @@ static ssize_t ath11k_dbg_sta_read_peer_
 					       size_t count, loff_t *ppos)
 {
 	struct ieee80211_sta *sta = file->private_data;
-	struct ath11k_sta *arsta = (struct ath11k_sta *)sta->drv_priv;
+	struct ath11k_sta *arsta = ath11k_sta_to_arsta(sta);
 	struct ath11k *ar = arsta->arvif->ar;
 	char buf[32] = {0};
 	int len;
@@ -480,7 +480,7 @@ static ssize_t ath11k_dbg_sta_write_delb
 					  size_t count, loff_t *ppos)
 {
 	struct ieee80211_sta *sta = file->private_data;
-	struct ath11k_sta *arsta = (struct ath11k_sta *)sta->drv_priv;
+	struct ath11k_sta *arsta = ath11k_sta_to_arsta(sta);
 	struct ath11k *ar = arsta->arvif->ar;
 	u32 tid, initiator, reason;
 	int ret;
@@ -531,7 +531,7 @@ static ssize_t ath11k_dbg_sta_write_addb
 					       size_t count, loff_t *ppos)
 {
 	struct ieee80211_sta *sta = file->private_data;
-	struct ath11k_sta *arsta = (struct ath11k_sta *)sta->drv_priv;
+	struct ath11k_sta *arsta = ath11k_sta_to_arsta(sta);
 	struct ath11k *ar = arsta->arvif->ar;
 	u32 tid, status;
 	int ret;
@@ -581,7 +581,7 @@ static ssize_t ath11k_dbg_sta_write_addb
 					  size_t count, loff_t *ppos)
 {
 	struct ieee80211_sta *sta = file->private_data;
-	struct ath11k_sta *arsta = (struct ath11k_sta *)sta->drv_priv;
+	struct ath11k_sta *arsta = ath11k_sta_to_arsta(sta);
 	struct ath11k *ar = arsta->arvif->ar;
 	u32 tid, buf_size;
 	int ret;
@@ -632,7 +632,7 @@ static ssize_t ath11k_dbg_sta_read_aggr_
 					     size_t count, loff_t *ppos)
 {
 	struct ieee80211_sta *sta = file->private_data;
-	struct ath11k_sta *arsta = (struct ath11k_sta *)sta->drv_priv;
+	struct ath11k_sta *arsta = ath11k_sta_to_arsta(sta);
 	struct ath11k *ar = arsta->arvif->ar;
 	char buf[64];
 	int len = 0;
@@ -652,7 +652,7 @@ static ssize_t ath11k_dbg_sta_write_aggr
 					      size_t count, loff_t *ppos)
 {
 	struct ieee80211_sta *sta = file->private_data;
-	struct ath11k_sta *arsta = (struct ath11k_sta *)sta->drv_priv;
+	struct ath11k_sta *arsta = ath11k_sta_to_arsta(sta);
 	struct ath11k *ar = arsta->arvif->ar;
 	u32 aggr_mode;
 	int ret;
@@ -697,7 +697,7 @@ ath11k_write_htt_peer_stats_reset(struct
 				  size_t count, loff_t *ppos)
 {
 	struct ieee80211_sta *sta = file->private_data;
-	struct ath11k_sta *arsta = (struct ath11k_sta *)sta->drv_priv;
+	struct ath11k_sta *arsta = ath11k_sta_to_arsta(sta);
 	struct ath11k *ar = arsta->arvif->ar;
 	struct htt_ext_stats_cfg_params cfg_params = { 0 };
 	int ret;
@@ -756,7 +756,7 @@ static ssize_t ath11k_dbg_sta_read_peer_
 						 size_t count, loff_t *ppos)
 {
 	struct ieee80211_sta *sta = file->private_data;
-	struct ath11k_sta *arsta = (struct ath11k_sta *)sta->drv_priv;
+	struct ath11k_sta *arsta = ath11k_sta_to_arsta(sta);
 	struct ath11k *ar = arsta->arvif->ar;
 	char buf[20];
 	int len;
@@ -783,7 +783,7 @@ static ssize_t ath11k_dbg_sta_read_curre
 						       loff_t *ppos)
 {
 	struct ieee80211_sta *sta = file->private_data;
-	struct ath11k_sta *arsta = (struct ath11k_sta *)sta->drv_priv;
+	struct ath11k_sta *arsta = ath11k_sta_to_arsta(sta);
 	struct ath11k *ar = arsta->arvif->ar;
 	u64 time_since_station_in_power_save;
 	char buf[20];
@@ -817,7 +817,7 @@ static ssize_t ath11k_dbg_sta_read_total
 						     size_t count, loff_t *ppos)
 {
 	struct ieee80211_sta *sta = file->private_data;
-	struct ath11k_sta *arsta = (struct ath11k_sta *)sta->drv_priv;
+	struct ath11k_sta *arsta = ath11k_sta_to_arsta(sta);
 	struct ath11k *ar = arsta->arvif->ar;
 	char buf[20];
 	u64 power_save_duration;
--- a/drivers/net/wireless/ath/ath11k/dp_rx.c
+++ b/drivers/net/wireless/ath/ath11k/dp_rx.c
@@ -1099,7 +1099,7 @@ int ath11k_dp_rx_ampdu_start(struct ath1
 			     struct ieee80211_ampdu_params *params)
 {
 	struct ath11k_base *ab = ar->ab;
-	struct ath11k_sta *arsta = (void *)params->sta->drv_priv;
+	struct ath11k_sta *arsta = ath11k_sta_to_arsta(params->sta);
 	int vdev_id = arsta->arvif->vdev_id;
 	int ret;
 
@@ -1117,7 +1117,7 @@ int ath11k_dp_rx_ampdu_stop(struct ath11
 {
 	struct ath11k_base *ab = ar->ab;
 	struct ath11k_peer *peer;
-	struct ath11k_sta *arsta = (void *)params->sta->drv_priv;
+	struct ath11k_sta *arsta = ath11k_sta_to_arsta(params->sta);
 	int vdev_id = arsta->arvif->vdev_id;
 	dma_addr_t paddr;
 	bool active;
@@ -1456,7 +1456,7 @@ ath11k_update_per_peer_tx_stats(struct a
 	}
 
 	sta = peer->sta;
-	arsta = (struct ath11k_sta *)sta->drv_priv;
+	arsta = ath11k_sta_to_arsta(sta);
 
 	memset(&arsta->txrate, 0, sizeof(arsta->txrate));
 
@@ -5242,7 +5242,7 @@ int ath11k_dp_rx_process_mon_status(stru
 			goto next_skb;
 		}
 
-		arsta = (struct ath11k_sta *)peer->sta->drv_priv;
+		arsta = ath11k_sta_to_arsta(peer->sta);
 		ath11k_dp_rx_update_peer_stats(arsta, ppdu_info);
 
 		if (ath11k_debugfs_is_pktlog_peer_valid(ar, peer->addr))
--- a/drivers/net/wireless/ath/ath11k/dp_tx.c
+++ b/drivers/net/wireless/ath/ath11k/dp_tx.c
@@ -467,7 +467,7 @@ void ath11k_dp_tx_update_txcompl(struct
 	}
 
 	sta = peer->sta;
-	arsta = (struct ath11k_sta *)sta->drv_priv;
+	arsta = ath11k_sta_to_arsta(sta);
 
 	memset(&arsta->txrate, 0, sizeof(arsta->txrate));
 	pkt_type = FIELD_GET(HAL_TX_RATE_STATS_INFO0_PKT_TYPE,
@@ -627,7 +627,7 @@ static void ath11k_dp_tx_complete_msdu(s
 		ieee80211_free_txskb(ar->hw, msdu);
 		return;
 	}
-	arsta = (struct ath11k_sta *)peer->sta->drv_priv;
+	arsta = ath11k_sta_to_arsta(peer->sta);
 	status.sta = peer->sta;
 	status.skb = msdu;
 	status.info = info;
--- a/drivers/net/wireless/ath/ath11k/mac.c
+++ b/drivers/net/wireless/ath/ath11k/mac.c
@@ -2832,7 +2832,7 @@ static void ath11k_peer_assoc_prepare(st
 
 	lockdep_assert_held(&ar->conf_mutex);
 
-	arsta = (struct ath11k_sta *)sta->drv_priv;
+	arsta = ath11k_sta_to_arsta(sta);
 
 	memset(arg, 0, sizeof(*arg));
 
@@ -4313,7 +4313,7 @@ static int ath11k_mac_op_set_key(struct
 		ath11k_warn(ab, "peer %pM disappeared!\n", peer_addr);
 
 	if (sta) {
-		arsta = (struct ath11k_sta *)sta->drv_priv;
+		arsta = ath11k_sta_to_arsta(sta);
 
 		switch (key->cipher) {
 		case WLAN_CIPHER_SUITE_TKIP:
@@ -4904,7 +4904,7 @@ static int ath11k_mac_station_add(struct
 {
 	struct ath11k_base *ab = ar->ab;
 	struct ath11k_vif *arvif = ath11k_vif_to_arvif(vif);
-	struct ath11k_sta *arsta = (struct ath11k_sta *)sta->drv_priv;
+	struct ath11k_sta *arsta = ath11k_sta_to_arsta(sta);
 	struct peer_create_params peer_param;
 	int ret;
 
@@ -5028,7 +5028,7 @@ static int ath11k_mac_op_sta_state(struc
 {
 	struct ath11k *ar = hw->priv;
 	struct ath11k_vif *arvif = ath11k_vif_to_arvif(vif);
-	struct ath11k_sta *arsta = (struct ath11k_sta *)sta->drv_priv;
+	struct ath11k_sta *arsta = ath11k_sta_to_arsta(sta);
 	struct ath11k_peer *peer;
 	int ret = 0;
 
@@ -5194,7 +5194,7 @@ static void ath11k_mac_op_sta_set_4addr(
 					struct ieee80211_sta *sta, bool enabled)
 {
 	struct ath11k *ar = hw->priv;
-	struct ath11k_sta *arsta = (struct ath11k_sta *)sta->drv_priv;
+	struct ath11k_sta *arsta = ath11k_sta_to_arsta(sta);
 
 	if (enabled && !arsta->use_4addr_set) {
 		ieee80211_queue_work(ar->hw, &arsta->set_4addr_wk);
@@ -5208,7 +5208,7 @@ static void ath11k_mac_op_sta_rc_update(
 					u32 changed)
 {
 	struct ath11k *ar = hw->priv;
-	struct ath11k_sta *arsta = (struct ath11k_sta *)sta->drv_priv;
+	struct ath11k_sta *arsta = ath11k_sta_to_arsta(sta);
 	struct ath11k_vif *arvif = ath11k_vif_to_arvif(vif);
 	struct ath11k_peer *peer;
 	u32 bw, smps;
@@ -6201,7 +6201,7 @@ static void ath11k_mac_op_tx(struct ieee
 	}
 
 	if (control->sta)
-		arsta = (struct ath11k_sta *)control->sta->drv_priv;
+		arsta = ath11k_sta_to_arsta(control->sta);
 
 	ret = ath11k_dp_tx(ar, arvif, arsta, skb);
 	if (unlikely(ret)) {
@@ -8233,7 +8233,7 @@ static void ath11k_mac_set_bitrate_mask_
 					     struct ieee80211_sta *sta)
 {
 	struct ath11k_vif *arvif = data;
-	struct ath11k_sta *arsta = (struct ath11k_sta *)sta->drv_priv;
+	struct ath11k_sta *arsta = ath11k_sta_to_arsta(sta);
 	struct ath11k *ar = arvif->ar;
 
 	spin_lock_bh(&ar->data_lock);
@@ -8637,7 +8637,7 @@ static void ath11k_mac_op_sta_statistics
 					 struct ieee80211_sta *sta,
 					 struct station_info *sinfo)
 {
-	struct ath11k_sta *arsta = (struct ath11k_sta *)sta->drv_priv;
+	struct ath11k_sta *arsta = ath11k_sta_to_arsta(sta);
 	struct ath11k *ar = arsta->arvif->ar;
 	s8 signal;
 	bool db2dbm = test_bit(WMI_TLV_SERVICE_HW_DB2DBM_CONVERSION_SUPPORT,
--- a/drivers/net/wireless/ath/ath11k/peer.c
+++ b/drivers/net/wireless/ath/ath11k/peer.c
@@ -446,7 +446,7 @@ int ath11k_peer_create(struct ath11k *ar
 	peer->sec_type_grp = HAL_ENCRYPT_TYPE_OPEN;
 
 	if (sta) {
-		arsta = (struct ath11k_sta *)sta->drv_priv;
+		arsta = ath11k_sta_to_arsta(sta);
 		arsta->tcl_metadata |= FIELD_PREP(HTT_TCL_META_DATA_TYPE, 0) |
 				       FIELD_PREP(HTT_TCL_META_DATA_PEER_ID,
 						  peer->peer_id);
--- a/drivers/net/wireless/ath/ath11k/wmi.c
+++ b/drivers/net/wireless/ath/ath11k/wmi.c
@@ -6453,7 +6453,7 @@ static int ath11k_wmi_tlv_rssi_chain_par
 		goto exit;
 	}
 
-	arsta = (struct ath11k_sta *)sta->drv_priv;
+	arsta = ath11k_sta_to_arsta(sta);
 
 	BUILD_BUG_ON(ARRAY_SIZE(arsta->chain_signal) >
 		     ARRAY_SIZE(stats_rssi->rssi_avg_beacon));
@@ -6541,7 +6541,7 @@ static int ath11k_wmi_tlv_fw_stats_data_
 							   arvif->bssid,
 							   NULL);
 			if (sta) {
-				arsta = (struct ath11k_sta *)sta->drv_priv;
+				arsta = ath11k_sta_to_arsta(sta);
 				arsta->rssi_beacon = src->beacon_snr;
 				ath11k_dbg(ab, ATH11K_DBG_WMI,
 					   "stats vdev id %d snr %d\n",
@@ -7468,7 +7468,7 @@ static void ath11k_wmi_event_peer_sta_ps
 		goto exit;
 	}
 
-	arsta = (struct ath11k_sta *)sta->drv_priv;
+	arsta = ath11k_sta_to_arsta(sta);
 
 	spin_lock_bh(&ar->data_lock);
 
